Pump



April 21, 1942. v, KLEIN ETAL 2,280,708

PUMP

Filed Nov. 4, 1940 I) Sheets-Sheet l FIG.I.

Patented Apr. 21, 1942 PUMP Victor G. Klein, St. Louis, and JonathanKludt, Ladue, Mo., assignors to Lincoln Engineering Company, St.Missouri Louis, Mo., a corporation of Application November 4,4940,Serial No. 364,194 22 Claims. (01. 221-411) semi-plastic materialsdirectly from commercial containers; the provision of a pump of theclass described which avoids the necessity for usingv a long suctiontube whichwould set up too much friction in the case of semi-plasticmaterials; the. provision of a pump of the class. described which willprovide semi-plastic material under such pressure as will force thismaterial through lines of substantial length; and the provision of adevice of the class described which will avoid entrainment of air andhence which will provide air-free delivery. Other objects will be inpart obvious and in part pointed out hereinafter. The inventionaccordingly comprises the elements and combinations of elements,features of construction, and arrangements of parts which will beexemplified in the structures hereinafter described, and the scope ofthe application-of which will be indicated in the following claims. Inaccompanying drawings, in which is illus trated one of various possibleembodiments of the invention,

Fig. 1 is a side elevation showing follower and pump parts in elevatedposition above a container which is illustrated in section;

Fig. 2 is a view similar to Fig. 1 showing the follower and pump partsdepressed into the container;

Fig. 3 is an enlarged'vertical section of certain pump parts at thebegirming of a suction stroke;

Fig. 4 is a fragmentary view similar to Fig. 3, showing the position ofparts at the end of the suction stroke;

Fig. 5 is an enlarged vertical section of a lift cylinder; and,

Fig. 6 is an enlarged horizontal section taken on line 6-6 of Fig. 5.

Similar reference characters indicate corresponding' parts throughoutthe several views of the drawings.

Referring now more particularly to Fig. 1, there is shown at numeral acommercial container for semi-plastics, such as caulking compounds,putty, or the like. It is desired to empty this container by applying apump directly thereto.

Numerals 3 and 5 show supporting plates between which are spacing andsupporting pillars 1. These form a supporting frame in which are tensionholders |0| for the container I.

' On the upper plate 5 is carried a manifold 9 for a lift cylinder II.In the cylinder II is a piston |3 on the upper end of a piston rod l5,which passes down through a packing gland I! on the manifold 9. At theupper end of the cylinder H is a buffer spring l9 with which the pistonl3 contacts at the upper end of its stroke. This absorbs shock.

In the manifold 9 is an inlet 2| communicating with the lower end of thecylinder H and also an inlet 23 which, through a pipe 25, communicateswith the upper end of the cylinder Each of the inlets 2| and 23 carriesan inlet fitting 29 and 3|, respectively, which provides for selectivequick-detachable connections with a coupling 33 on the end of a flexibleair hose 35. The hose 35 receives air from a supply line 31. Byattaching the couplers 33 to one or the other of the fittings 29 or 3|,compressed air. may be brought under the piston l3 or above it. When thecoupler 33 is on one of the fittings 29 or 3|, the other fitting servesas an air-relief port for the other side of the piston' I3, since' thereare no check valves in the fittings 29 or 3 The line 31 also supplies aflexible hose 45 for supplying the motive fluid to an engine ll.

The piston i'od l5 extends downward where it is attached to a frame 39.This frame supports the fluid engine 4| (air engine in the presentexample), and its integral valve control 43. Thedetails of the engineand its valve gear are not shown, since these are known (see for exampleUnited States Patent 2,215,852 dated September 24, 1940, of Victor G.Klein, and the im- 7 provement application thereon of Frank S. Barks andVictor G. Klein, Serial No. 359,034, flied September 30, 1940, for Valvemechanism). The essential features of the engine, so far as the presentdisclosure is concerned isthat it receives an operating fluid over theflexible line which results in reciprocation of a downwardly directedpiston rod 41 extending from the engine, provided that resistance to the.movement of the rod 41 is not so great as to stall the engine. Whensaid resistance becomes great enough, the engine stops, Pump parts areattached to a plate 49 carried upon spacing pillars 5| extending fromthe engine 4|.

What may be referred to as a pump cylinder is shown at 53, fastened bymeans of a nut to the plate 49. This cylinder 53 at its lower end isattached to a flared hell 5!, flanged at the bottom, as shown at 59, andattached by means of Studs and removable wing nuts'il to a followerplate 63. The plate 63 has a movable fit in the drum I. The clearancebetween the circular edge of the plate 53 and the inner circular wall ofthe drum I need not be snug, but it should be a fairly accurate loosefit. The central por-- tion of the follower63 has a relatively largeopening 65, to communicate with the hollow interior of the bell 51.

The cylinder 53 has an upper bore 61, in which is a closely fittingplunger 69. Below the bore Bl is a counterbore 1|, into the lower end ofwhich is screwed a lift cylinder 13. The upper end of the cylinder 13 isformed with a spherical seat 15, for supporting a movable valve seat 11.The lower side of the valve seat is also spherical, and rocks on thesupporting seat 15. Double-shouldered means 13 at the lower end of thecylinder 53 serves to axially center the valve seat, but permits rockingmovement about anyhorizontal axis.

' The upper side of the valve seat 11 is machined (preferably flat) forsealing engagement with the lower edge of a valve 8|. The valve isslidable around an extension 83 from the plunger 69. The upper end ofthe valve 8! is crenelated as shown at 35, so that fluid may flow aroundit and, into the bore 61 upon a retractive stroke of the plunger 69, orat least to allow a communication between any vacuum in cylinder 61 withcounterbore 1|.

The counterbore 1| is provided with an outlet 81 with which communicatesan outwardly opening double check-valve member 89. The doublecheck-valve member 88 communicates with an accumulator cylinder 9|, theopposite end of which is connected at 93 with a flexible line 95 leadingto a hand control valve 91. Attached to the valve 91 may be any suitablenozzle for applying the semi-plastic.

At the lower end of the extension 83 (Figs. 3 and'4) is attached anelevator disc 99 which has a good enough fit with respect to theinterior of the lift cylinder 13 (Fig. 4) to effect lifting of plasticpast valve 8!, but said fit is poor enough so that above a certainpressure extrusion will occur of material back through the clearancebetween the elevator disc 93 and the cylinder 13. This will return tothe supply.

Operation is as follows:

The coupling 33 is first attached to the fitting 29, whereupon airpushes up the piston It with rod I5 to lift the assembly of pump parts,including the follower 63, as shown in Fig. 1. This permits of placingthe container I in position on the base 3 after its cover has beenremoved. The container may beheld down in proper axial position by meansof tension rods. one of which is shown at. l0].

Next, the coupler 33 is removed from the fitting 29, whereupon gravitywill carry down the pump parts by their own weight. This applies thefollower 63 to the top of the plastic in the container I. If the plasticis particularly thick and additional force on it is desired, this may beobtained by applying the coupler 33 to the fitting 3|. This introducesair pressure above the piston 13 and applies force to the pump assemblyvia the rod l5. Hence additional force is applied to the follower 63.

when the valve 91 is opened, resistance is released in the outlet 81 andthe pump 4| (which was theretofore stalled) automatically startsoperation to reciprocate the plunger 69. Starting with the position ofthe plunger parts shown in Fig. 3, and progressing up to the positionshown in Fig. 4, it will be seen that a vacuum will be drawn by theplunger 69 in the bore 61, tending to unseat the valve 3| and to draw upplastic materials. Such a vacuum alone, it has been found, is notsufiicient to pump plastics at desired rates, especially not throughlong suction pipes. It is for this reason that the bell 51 and extension83 are used with the elevator disc 99 and lift cylinder H3. The disc 99serves to push up or elevate the plastic mass which is above it andraise this mass through the lift cylinder 13. After the elevator disc 33enters the lift cylinder 13, the volumetric displacement of it in thiscylinder 13 is greater than that in the bore 61. This is because of therelatively large bore of cylinder 13 and diameter of disc 99. Henceplastic crowds past the valve BI and this infills the vacuum in 51.

Any further excess that cannot be pushed on is squeezed back and outaround the disc 99, and passes back to the supply in the bell 51. Upon adownstroke the valve Bl closes and the compressive action of the plunger39 compresses material through the outlet 81.

During the upstroke both a vacuum (at 31) and a lifting action (by 99)are used, the lifting action serving not only to infill the vacuum underplunger 69 but also to squeeze plastic toward the outlet 81. Theinfllling into the vacuum under 69 prepares the plunger 69 for pressingout plastic to outlet 31 upon the downstroke. During the final portionsof the downstroke, the elevator disc 33 is quite clear of the liftcylinder 13, so that during all this time (which is substantial) theplastic may in-fiow above the disc 99 to form a more or less clingingmass which is ready to be lifted into the lift cylinder 73 upon upwardapproach of the disc 99 to the cylinder 13.

The purpose of the accumulator Qi is to smooth out pulsations of flow,so that the flow in the line is relatively smooth.

As pumping continues and material is withdrawn from the drum I, thefollower descends, and in view of the weight thereon, and, if desired,additional air pressure from above the piston I3, tends to squeezematerial up into the bell 51 and above the elevator disc 99 when loweredas in Fig. 3.

Finally, the condition shown in Fig. 2 is reached, wherein most or allof the material has been withdrawn from the container l. The coupling 33may be at this time applied to the fitting 29 and the assembly lifted tothe Fig. 1 position, the frame 5, I and rods I 05 forming positivereaction means between the piston l3 and container I while the follower63 is forcibly separated from the material It. If the suction action ofthe follower 63 resists lifting too much, the wing nut 6| may beloosened so that the assembly (down to and including the bell 51) may bewithdrawn, after which the disc 63 may be pulled out, the vacuum havingbeen broken by reason of entry of air through the opening 65. The discmay then be reapplied to the bell 51 for application to the nextcontainer. The large opening 65 available to atmosphere makes it easy topick out the follower, if necessary.

The device is applicable to materials, the viscosities of which are suchas not to pass between a fairly loose fit between the edge of followerB3 and inner wall of the container I, while the follower bears a weightor force from above, which is adapted to force the material through therelatively large opening 65 and into the bell 51.

In view of the above, it will be seen that the several objects of theinvention are achieved and other advantageous results attained,

As many changes could be made in the above constructions withoutdeparting from the scope of the invention, it is intended that allmatter contained in the above description or shownin the accompanyingdrawings shall be interpreted as illustrative and not in a limitingsense.

We claim:

1. In a pump, a follower for application to the surface of material in acylindric container, the shape of the follower loosely approximating across section of said cylinder with clearance, said follower having anopening for withdrawal of material, a pump located on the follower andwithdrawing material through said opening, an engine associated with thepump, means for app ying fluid pressure to the engine and pump in thedirection of their combined weights, the said fluid pressure and weightof the pump and engine being applied with the follower weight to thematerial as it is withdrawn from beneath it by the pump, the area ofsaid clearance and of said opening being so related that said force andweight press material through said opening without pressing it throughsaid clearance.

2. In a pump, a follower for application to the surface of material in acontainer, said follower having an opening for withdrawal of material, apump cylinder located on the follower for withdrawing material throughsaid opening and having an outlet for deliverypf material, an engineassociated with the pump cylinder, a plunger reciprocated by the engineand operating in said cylinder, means for applying fluid pressure to thepump and engine in the direction of their weights, the fluid pressureand weights of the pump and engine being applied with the followerweight to the material as it is withdrawn from beneath by the pump, andquick-detachable means between the pump and the follower.

3. In a pump, a frame work, a follower for application to the surface ofmaterial in a container, said follower contacting the material on itsbottomside and having an opening for withdrawal of material and alsobeing exposed to atmospheric pressure on its top side, a pump cylinderattached to the follower and having an outlet for delivery of material,an engine associated with the pump cylinder, a plunger reciprocated bythe engine and operating in said cylinder, fluid-pressure-operated meansconnected to the frame work for lifting the assembly of follower, engineand pump clear of the container and means attached to the frame work forholding the container in the frame when lifting is effective whereby thefollower may be forcibly separated from said material without relievingthe atmospheric pressure thereon prior to separation, said frameworkforming positive reaction means between the fluid-pressure-operatedmeans and the container.

4. In' a pump, a follower for application to the surface of material ina container, said follower having an opening for withdrawal ofmaterial,a pump cylinder located on the follower and having an outlet fordelivery of material, an engine associated with the pump cylinder, aplunger reciprocated by the engine and operating in said cylinder, theweight of the pump and engine being applied to the follower as materialis withdrawn from beneath it by the pump, and fluid-pressure-operatedmeans for lifting the assembly of engine and pump clear of thecontainer, said pressure-operated means being also and follower againstthe material, which is in addition to the force of gravity of saidengine and pump on the follower.

5. In'apparatus of the class described, a frame for receiving an opencontainer for material to be pumped, a. cylinder at the top of theapparatus, a piston in the cylinder, a piston rod reaching from saidpiston downwardly, an engine and pump assembly fastened to said piston'rod,

a follower supported in connection with said assembly and adapted tomove into said container against the surface of material therein, saidpump having an outlet and also an inlet through said follower,reciprocation of the pump by the engine resulting in withdrawal of fluidfrom beneath the follower for delivery to said outlet, means fordelivering air beneath said piston to lift the assembly with thefollower clear of the container, and means for releasing said air anddelivering air above the piston to force said assembly to push thefollower against the material in the container to effect an extrusionthereof through said inlet toward the pump.

6. Pump means comprising a follower forengaging the surface of thematerial to be pumped from a container, said follower having an openingforming a pump inlet, a lift cylinder above the inlet, a pump cylindercommunicating with the lift cylinder, a plunger in the pump cylinder, anextension from said plunger passing through the lift cylinder, anelevator disc on the extension movable from a position substantiallyclear of the lift cylinder to positions within the lift cylinder.

- 7. Pump means comprising a follower for engaging the surface of thematerial to be pumped, said follower having a relatively large opening,a relatively large bell-shaped inlet covering the opening, a smallerlift cylinder, a pump cylinder communicating with the lift cylinder, avalve controlling flow from the lift to the pump cylinder, a plunger inthe pump cylinder, an extension from said plunger passing through thelift cylinder, an elevator disc on the extension movable from a positionsubstantially clear of the lift cylinder and in the bell-shaped inlet topositions within the lift cylinder, said pump cylinder ing an outletabove said valve.

8. Pump means comprising a follower for engaging the surface of thematerial to be pumped, said follower having an opening, a bell-shapedinlet covering the opening and a lift cylinder, a pump cylindercommunicating with the lift cylinder, a plunger in the pump cylinder, anextension from said plunger passing through the lift cylinder, anelevator disc on the extension movable from a position substantiallyclear of the lift cylinder to positions within the lift cylinder, theclearance betweenv the elevator disc and the lift cylinder being enoughfor permitting back-flow past the disc, a valve between the disc and theplunger, said pump cylinder having an outlet above said valve.

9. Pump means comprising a follower for engaging the surface of thematerial to be pumped, said follower having an opening, a bell coveringthe opening and a lift cylinder thereabove, a pump cylindercommunicating with the lift cylinder, a plunger in the pump cylinder, anextension from said plunger passing through the lift cylinder, anelevator disc on the extension movable from a position substantiallyclear of the lift cylinder and in the bell to positions within the liftcylinder, the clearance between the elevaadapted to apply force to movesaid assembly havtor disc and the lift cylinder being enough forback-flow when necessary past the disc, a valve between the disc and theplunger, said cylinder 'having an outlet above said valve, and meansable from a position substantially clear of the lift cylinder topositions within the lift cylinder, a valve between the disc and theplunger, said cylinder having an outlet above said valve, and means forcontinually forcibly biasing the follower toward the material to extrudeit through the opening and into said bell and above the elevator disc.

- 11. Pump means comprising a follower for engaging the surface of thematerial to be pumped, said follower having an opening, a bell coveringthe opening and including a lift cylinder thereabove, a pump cylindercommunicating with the lift cylinder, a plunger in the pump cylinder, anextension from said plunger passing through the lift cylinder, anelevator disc on theextension movable from a position in the bell topositions within the lift cylinder, the clearance between the elevatordisc and the lift cylinder being enough for backflow past the disc, avalve between the disc and the plunger, said cylinder having an outletabove said valve, the volumetric displacement of the elevator disc inthe lift cylinder being greater than that of the plunger in the pumpcylinder during the part of the stroke in which the disc is in said liftcylinder.

12. Pumping apparatus comprising a pump cylinder, a plungerreciprocating therein, a lift cylinder forming an inlet for said pumpcylinder, a bell extending from said lift cylinder, an extension fromsaid plunger passing through said lift cylinder to the bell, an elevatordisc on said extension and loosely fitting the lift cylinder, the liftcylinder being in free communication with the bell, a valve between thelift cylinder and the pump cylinder permitting flow only from the formerto the latter, said pump cylinder having an outlet located above saidvalve.

13. Pumping apparatus comprising a pump cylinder, a plungerreciprocating therein, a lift cylinder forming an inlet for said pumpcylinder, an extension from said plunger passing through said lift,cylinder, an elevator disc on said exten sion and loosely fitting thelift cylinder and movable from points outside to points inside of thelift cylinder, a valve between the lift cylinder and the pump cylinderpermitting flow only from the former to the latter, said pump cylinderhaving an outlet located above said valve.

14. Pumping apparatus comprising a pumpcylinder, 9. plungerreciprocating therein, a lift cylinder forming an inlet for said pumpcylinder, an extension from said plunger passing through said liftcylinder, an elevator disc on said extension and loosely fitting thelift cylinder, a valve between the lift cylinder and the pump cylinderpermitting flow only from the former to the latter, said pump cylinderhaving in communication therewith an outlet located above said valve,the bore of the lift cylinder being larger than that of the pumpcylinder and said elevator disc fitting it loosely enough so that uponan upstroke excess material may be passed back to the bell-shapedportion around said elevator disc.

15. Pumping apparatus comprising a pump cylinder, a plungerreciprocating therein, a lift cylinder therein forming an inlet for saidpump cylinder, a bell extending from said lift cylinder, an extensionfrom said plunger passing through said lift cylinder and into the bell,an elevator disc on said extension and loosely fitting the liftcylinder, the lift cylinder being in free communication with thebell-shaped member when clear of the disc, a valve between the liftcylinder and the pump cylinder permitting flow only from the former tothe latter, said pump cylinder having in communication therewith anoutlet located above said valve, the bore of the lift cylinder beinglarger than that of the pump cylinder and said elevator disc fitting itloosely enough so that upon an upstroke excess material may be passedback to the bell-shaped portion around said elevator disc.

16. Pumping apparatus comprising a frame for receiving a container formaterials to be pumped, a cylinder at the upper end of the frame, apiston in the cylinder, means for introducing air either below or abovesaid piston to lift or to depress it respectively, a piston rodextending .down from said piston, an engine and pump assembly supportedby said piston rod and movable up and down, a follower carried by saidassembly and engageable with the surface of the material in thecontainer and having an opening for passage of said material to thepump, said pump comprising a cylinder, a plunger therein reciprocated bythe engine, a bell connecting the cylinder with the opening in saidfollower, a lift cylinder between the pump cylinder and the bell, anextension from the plunger passing through said lift cylinder and intothe bell, an elevator disc on said extension and movable throughout asubstantial portion of an upstroke freely in the bell and beyond thelift cylinder and thereafter in the lift cylinder.

17. Pumping apparatus comprising a frame for receiving a container formaterials to be pumped, a cylinder at the upper end of the frame, apiston in the cylinder, means for introducing air either below or abovesaid piston to lift or to depress it respectively, a piston rodextending down from said piston, an engine and pump assembly supportedby said piston rod and movable up and down, a follower carried by saidassembly and engageable with the surface of the material in thecontainer and having an opening for passage of said material to thepump, said pump comprising a cylinder, 2. plunger therein reciprocatedby the engine, a bell connecting the cylinder with the opening in saidfollower, a lift cylinder between the pump cylinder and the bell, anextension from the plunger passing through said lift cylinder and intothe bell, an elevator disc on said extension and movable throughout asubstantial portion of an upstroke freely in the bell and beyond thelift cylinder and thereafter in the lift cylinder, said disc having arelatively lzose fit in the lift cylinder.

18. Pumping apparatus comprising a frame for receiving a container formaterials to be pumped, a cylinder at the upper end of the frame, apiston in the cylinder, means for introducing air either below or abovesaid piston to lift or to depress it respectively, a piston rodextending down from said piston, an engine and pump assembly supportedby said piston rod and movable up and down, a follower carried by saidassembly and engageable with the surface of the material in thecontainer and having an opening for passage of said material, said pumpcomprising a cylinder, a plunger therein reciprocated by the engine, abell connecting the cylinder with the opening in said follower, a liftcylinder between the pump cylinder and the bell, an extension from theplunger passing through said lift cylinder and into the bell, anelevator disc on said extension and movable throughout a substantialportion of the stroke freely in the bell and beyond the lift cylinder,said disc having a relatively loose fit in the lift cylinder throughoutthe remainder of the stroke, said pump cylinder having an outlet abovethe lift cylinder, a check valve in the outlet and a valve permittingonly flow from the lift cylinder toward said pump cylinder, said plungerthereafter forcing the material through said outlet.

19. Pumping apparatus comprising a frame for receiving a container formaterials to be pumped, a cylinder at the upper end of the frame, apiston in the cylinder, means for introducing air either below or abovesaid piston to lift or to depress it respectively, a piston rodextending from said piston, an engine and pump assembly supported bysaid piston rod and movable up and down, a follower carried by saidassembly andengageable with the surface of the material in the containerand having an opening for passage of said material, saidpump comprisinga, cylinder, a plunger therein reciprocated by the engine, a bellconnecting the cylinder with the opening in said follower, a liftcylinder between the pump cylinder and the bell, an extension from theplunger passing through said lift cylinder and into the bell, anelevator disc on said extension and movable throughout a substantialportion of the stroke freely in the bell and beyond the lift cylinder,said disc moving in the lift cylinder throughout the remainder of thestroke and having a loose fit therein, said pump cylinder having anoutlet' above the lift cylinder, and acheck valve permitting only flowfrom the lift cylinder toward said outlet, the volumetric displacementof the disc in and the bell, an extension from the plunger passingthrough said lift cylinder and into the bell, an elevator disc on saidextension and movable throughout a substantial portion of the strokefreely in the bell and beyond the lift cylinder, said disc having arelatively loose fltand being movable in the lift cylinder throughoutthe remainder of the stroke, said pump cylinder having an outlet abovethe lift cylinder, and a check valve permitting only flow from the liftcylinder toward said outlet, the volumetric displacement of the disc inthe lift cylinder being greater than the pump plunger during the timethat said disc is movable in said lift cylinder, said follower beingbiased against the material by the weight of the pump and enginethereon, and additionally by the action of air upon the upper side ofsaid piston.

21. Pumping apparatus comprising a frame for receiving a container formaterials to be pumped, a cylinder at the upper end of the frame, apiston in the cylinder, means for introducing'air either below or abovesaid piston to lift or to depress it respectively, a piston rodextending from said piston, an engine and pump assembly supported bysaid piston rod and movable up and down, a follower carried by saidassembly and engageable with the surface of the material in thecontainer and having an opening for passage of said material, said pumpcomprising a cylinder, a plunger therein reciprocated by the engine, abell connecting the cylinder with the opening in said follower, a liftcylinder between the pump cylinder the lift cylinder being greater thanthe pump plunger during the time that said disc is movable in said liftcylinder.

20. Pumping apparatus comprising a frame for receiving a container formaterials to be pumped, a cylinder at the upper end of the frame, apiston in the cylinder, means for introducing air either below or abovesaid piston to lift or to depress it respectively, a piston rodextending from said fi5 piston, an engine and pump assembly supported bysaid piston rod and movable up and down, a follower carried by saidassembly and engageable with the surface of the material in thecontainer and having an opening for passage of said material, said pumpcomprising a cylinder, a plunger therein reciprocated by the engine, abell connecting the cylinder with the opening in said and the bell, anextension from the plunger passing through said lift cylinder and intothe bell, an elevator disc on said extension and movable throughout asubstantial portion of the stroke freely in the bell and beyond the liftcylinder, said disc having a relatively loose fit and being movable inthe lift cylinder throughout the remainder of the stroke, said pumpcylinder having an outlet above the lift cylinder, and a check valvepermitting only flow from the lift cylinder toward said plunger duringthe time that said disc is movable in said lift cylinder, said followerbeing biased against the material by the weight of the pump and enginethereon.

22. Pumping apparatus comprising an assembly consisting of an engine, apump, a follower adapted to rest upon material to be pumped, saidfollower having an opening, means connecting the pump with the followerand said opening comprising a bell, said pump having a pump cylinder. aplungerin the cylinder, a lift cylinder communicating with the pumpcylinder, a check valve between said cylinders, and a lifting discoperable follower, a lift cylinder between the pump cylinder by the pumppiston and movable into said lift cylinder, said pump having an outletabove said valve, and an accumulator with which said outlet is incommunication andwhich is carried by the engine and pump assembly.

VICTOR G. KLEIN. JONATHAN KLUDT.

